Rajasthan Polytechnic Third Year Paper 2016 – Photo Litho Plate Making

Rajasthan Polytechnic Third Year Paper 2016 – Photo Litho Plate Making

Ink and water receptivity like feature is found in
(a) Lithoplate metal
(b) Type alloy
(c) Sand
(d) All above wrong

Metal chosen for image area must have a merit of
(a) water loving
(b) oil loving
(c) Above (a) right
(d) Above (b) wrong

Metal chosen for non image area must have a merit of
(a) water loving
(b) oil loving
(c) Above (b) right
(d) Above (a) wrong

Copper metal is used in printing industry in preparation of
(a) Letterpress block only
(b) Lithographic plate only
(c) Gravure cylinder only
(d) All of above right

Factors affecting quality of graining are
(a) Quality of sand
(b) Size of balls
(c) Machine speed
(d) All above right

Purpose of graining is
(a) To create liquid receptivity in the surface of the metal
(b) Above (a) wrong
(c) Above (b) right
(d) Above all wrong

Stage coming before exposure in litho plate making is called
(a) Developing
(b) Focusing
(c) Coating
(d) Fixing

Stage coming after exposure in lithoplate making is called
(a) Developing
(b) Focusing
(c) Coating
(d) Fixing

After exposure, following is produced on the plate
(a) visible image
(b) latent image
(c) above (b) wrong
(d) Above (a) right

Latent image becomes visible after
(a) Developing process
(b) Exposure
(c) Coating
(d) Graining